Probable Quasi-Periodic Oscillations in the {\tt TESS} observations of blazars in the Swift X-ray Survey
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Tripathi, Ashutosh Wiita, Paul J. Smith, Krista Lynne |
| author_facet | Tripathi, Ashutosh Wiita, Paul J. Smith, Krista Lynne |
| contents | This work presents possible quasi-periodic oscillations in the Transiting Exoplanet Survey Satellite observations of blazars that are in the 157-month hard X-ray survey done by Swift's Burst Alert Telescope. We report observations from four sources, J1104.4+3812, J1654.0+3946, J0353.4-6830, and J1941.3-6216, that show at least 3$σ$ local significance in generalized Lomb-Scargle periodogram and weighted wavelet Z-transform methods. These results are also checked using a continuous autoregressive moving average analysis that also predicts the absent data tentatively using stochastic differential equations. Each of these four sources exhibits a nominal QPO signal frequency in the range of 0.5--1.1 d$^{-1}$, resulting in at least 5 putative cycles. However, when the number of frequencies examined and the number of sources examined are both taken into account, the global significances are reduced to $\approx2.2σ$ for J1654.0+3964 (Mrk 501), and to $\approx1.9σ$ for other sources. These QPOs are thought to arise from the processes within the relativistic jet. Plausible explanations include the kink instability, which arises due to current-driven instabilities in the plasma or the precession of substructures, or mini-jets, within the jets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11266 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probable Quasi-Periodic Oscillations in the {\tt TESS} observations of blazars in the Swift X-ray Survey Tripathi, Ashutosh Wiita, Paul J. Smith, Krista Lynne High Energy Astrophysical Phenomena This work presents possible quasi-periodic oscillations in the Transiting Exoplanet Survey Satellite observations of blazars that are in the 157-month hard X-ray survey done by Swift's Burst Alert Telescope. We report observations from four sources, J1104.4+3812, J1654.0+3946, J0353.4-6830, and J1941.3-6216, that show at least 3$σ$ local significance in generalized Lomb-Scargle periodogram and weighted wavelet Z-transform methods. These results are also checked using a continuous autoregressive moving average analysis that also predicts the absent data tentatively using stochastic differential equations. Each of these four sources exhibits a nominal QPO signal frequency in the range of 0.5--1.1 d$^{-1}$, resulting in at least 5 putative cycles. However, when the number of frequencies examined and the number of sources examined are both taken into account, the global significances are reduced to $\approx2.2σ$ for J1654.0+3964 (Mrk 501), and to $\approx1.9σ$ for other sources. These QPOs are thought to arise from the processes within the relativistic jet. Plausible explanations include the kink instability, which arises due to current-driven instabilities in the plasma or the precession of substructures, or mini-jets, within the jets. |
| title | Probable Quasi-Periodic Oscillations in the {\tt TESS} observations of blazars in the Swift X-ray Survey |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.11266 |